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Flashcards in Cardiovascular Deck (392)
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31

What vessel supplies oxygenated blood to the fetus? What vessel does it join?

ductus venosus

IVC

32

Upon reaching fetal circulation, where does most of the oxygenated blood go? Via what structure?

head

foramen oale

33

Upon reaching fetal circulation, where does most of the de-oxygenated blood go?

RA --> RV --> patent Ductus arteriosus

34

Why does blood preferentially flow through the PDA rather than pulmonary vein?

fetal lungs are high pressure

35

What is a closed foramen ovale called?

fossa ovalis

36

What drug is used to keep the PDA open?

Indomethacin

37

What prostaglandins keep the PDA open?

E1 and E2

38

What does the umbilical vein become?

ligamentum teres hepatis

39

What does the umbilical artery become?

medial umbilical ligaments

40

What does the ductus arteriosus become?

ligamentum arteriosum

41

What does the ductus venosum become?

ligamentum venosum

42

What does the allantois become?

urachus/median umbilical ligament

43

What does the notochord become?

nucleus pulposus

44

Would coronary blood flow peak during early or late diastole?

early

45

Enlargement of the left atria can cause what two mediastinal symptoms?

dysphagia

hoarseness of voice

46

What is Ficks equation?

CO = O2 consumption/arterial O2 - venous O2

47

What is the equation for MAP?

(2/3 diastolic)(1/3 systolic)

48

Would hyperthyroidism increase or decrease pulse pressure?

increase

49

Would aortic regurgitation increase or decrease pulse pressure?

decrease

50

Would aortic stenosis increase or decrease pulse pressure?

decrease

51

Would obstructive sleep apnea increase or decrease pulse pressure?

increase

52

Would cardiogenic shock increase or decrease pulse pressure?

decrease

53

Would tamponade increase or decrease pulse pressure?

decrease

54

What would decreased extracellular sodium do to contractility?

increase contractility

55

What would acidosis do to contractility? By what mechanism?

decrease

protons inhibit ca2+ influx

56

What would hypoxia do to contractiltiy?

decrease

57

What would hypercapnia do to contractiltiy?

decrease

58

What is the equation for LaPlace's Law on wall tension?

(pressure)(radius)/(two)(wall thickness)

59

What is the Y-axis on Starlings Curve?

cardiac output

60

What is the X-axis on Starlings Curve?

preload/EDV